assistant

Design engineering principles for making interfaces feel polished. Use when building UI components, reviewing frontend code, implementing animations, hover states, shadows, borders, typography, micro-interactions, enter/exit animations, or any visual detail work. Triggers on UI polish, design details, "make it feel better", "feels off", stagger animations, border radius, optical alignment, font smoothing, tabular numbers, image outlines, box shadows.

Project scaffolding CLI with 30+ integrations, custom templates, and MCP server for AI agents.

Opinionated toolkit for building, versioning, and publishing high-quality JavaScript/TypeScript packages.

Reactive client-first store for your API with collections, live queries, and optimistic mutations.

Centralized, extensible devtools panel for TanStack libraries with a plugin architecture.

Framework-agnostic debouncing, throttling, rate limiting, queuing, and batching utilities.

Powerful asynchronous state management, server-state utilities, and data fetching for TS/JS, React, Vue, Solid, Svelte & Angular.

Headless utilities for building range and multi-range sliders in TS/JS, React, Vue, Solid, Svelte & Angular.

Type-safe routing for React and Solid applications with first-class search params, data loading, and seamless integration with the React ecosystem.

Framework-agnostic, immutable reactive data store with framework adapters for React, Vue, Solid, Angular, and Svelte.

Headless UI for building powerful tables & datagrids for TS/JS, React, Vue, Solid, Svelte, Qwik, Angular, and Lit.

Headless UI for virtualizing large element lists at 60FPS in TS/JS, React, Vue, Solid, Svelte, Lit & Angular.